Overview
Physics are the natural sciences that study the substance, nature and nature of energy. Since matter and energy are essential elements that must be addressed in all scientific research, physics is one of the most fundamental disciplines in the natural sciences. Physics is an experimental science in which physicists identify patterns from observations and analyses of various material and energy-based phenomena in nature. These models are referred to as “physical theory”, and the usual physical theory that can be tested is referred to as the laws of physics until one day it is proven to be erroneous (proven). Physics is well built by these laws. Physics is one of the most fundamental disciplines in the natural sciences. Theories in the scientific and academic fields of chemistry, biology, archaeology and so forth are built on these laws of physics。
1. Refractive light (from the upper left corner in the direction of a clockwise); 2. A set of lasers; 3. Thermal balloons; 4. Gyroscopes; 5. Non-flexible collisions; 6. Hydrogen atomic orbit; 7 atomic bomb explosions; 8. Lightning; 9. Galaxies
Physics is one of the oldest academics. Physics, chemistry, biology, etc., were originally part of the philosophy of nature, and it was not until the seventeenth to nineteenth centuries that they evolved from natural philosophy into separate academic domains. 193-194 physics has a considerable intersection with many other cross-cutting studies, such as quantum chemistry, biophysical, etc. The boundaries of physics are not static, and the founding breakthroughs in physics can often be used to explain the underlying mechanisms of these cross-cutting studies and sometimes to open new ones。
Through the creation of new theories and the development of new technologies, physics has made a significant contribution to human civilization. For example, the rapid development of electromagnetics has resulted in the emergence of new products, such as electric lamps, electric motors and household appliances, as well as significant improvements in the standard of living of human society. As nuclear physics matures, nuclear power generation is no longer a blueprint idea, but its security implications also raise awareness of the earth's fragile environment, ecology and humanity。
History and development of ancient greek physics
Since ancient times, people have tried to understand the wonders of nature: why do objects fall to the ground and why do different substances have different properties? So wait. From observations and analyses of nature's phenomena, early people have found the patterns in them and have developed theories about them that try to explain nature's wonders, yet most of the theories they have put forward are incorrect。
In 1824, a painting was published in a mechanical magazine in london. Akimid said, "give me a point where i can break the whole planet."
In modern terms, early physical theory is more like some philosophical theory: modern theories need to be rigorously tested and those earlier theories have not been rigorously proven. Some of these theories, such as those put forward by tolmi and aristotle, are contrary to what can be observed on a daily basis。
Nevertheless, many ancient scholars have contributed quite the right theory. The ancient greek philosopher taylors (former 624 - former 546) travelled far across the mediterranean and studied astronomy and geometry in mesopotamia, egypt, and extended and expanded. He predicted a solar eclipse in 585 b. C., and was able to estimate the distance of the ship from the shore, and to calculate its height from the shadow of the pyramid. By refusing to rely on the primordial or supernatural factors to explain natural phenomena, taylor argued that there was a constant causal link between the occurrence of any event and its generality. The ancient greek philosopher rukiber of the 5th century b. C. And the student demuklit pioneered the atom theory that all matter was made up of non-destructive, indivisible atoms. An ancient greek thinker, akimid, has drawn many correct quantitative conclusions in terms of power, such as the interpretation of leverage。
Physics in the middle ages islamic world
Between 850 and 950 a. D., a large number of greek academics were translated into arabic. Muslim scientists inherited aristotle physics from the greeks. In the era of islamic gold, they built on these academic efforts, with special emphasis on observational action and the development of an early form of scientific methodology。
Heshwood is an optical extensioner
Scientists such as ibn sal, kendi, hashmu, ibn sina and others provide innovative theories in the field of optical and visual sciences. In his well-known book kitab al-manazir, heshmu firmly rejected the ancient greek visual theory — launching and giving new theories. By relying on information about the internal anatomical structure of the eyes, he explained how the light entered the eyes and was focused and projected into the back of the eyes, which he considered to be like a “massive chamber”, where the light entered a small hole, where it formed a reverse image. Apparently, here he's referring to a needlehole camera or a dark box. He also described how the dark room was used to observe the eclipse。
The achievements of heshwood have not received the attention they deserve in the arab world. In the twelfth century, his book, perspectiva, was translated into latin. Until the seventeenth century, the book was a standard reference book for optical science in europe, which strongly influenced the research of scientists such as johannes kepler, witrow and roger bacon。
Classic physics
Classical physics refers to physics that does not involve quantum mechanics or relativity, such as newton mechanics, thermodynamics, maxwell electromagnetics, etc。
Isaac newton (1643-1727)
The era of classical physics began in the first scientific revolution of the sixteenth century and ended in the late nineteenth century. Nicolas copernicus fired the first shot of the scientific revolution, and in 1543 he presented the japanese heart describing the solar system, saying that the theory had overturned the heart of tolmi. During the years 1609 and 1619, johannes kepler published the law governing the planetary movement, which accurately estimated, using mathematical equations, the public transport of planets around the sun from astronomical observations, thus giving strong and powerful theoretical support. Galileo galileo does an experimental research object movement, discovers the law of the fall and demonstrates the importance of the experimental method for scientific research. He relied on the evidence obtained through the use of experiments or observations rather than on pure reasoning to confirm the validity of any false statements. He stressed the use of mathematics to describe physical phenomena, the language of nature being mathematics, which could not be understood without it. In 1687, isaac newton's newton and gravitational law laid a solid foundation for classical physics, and he and gottfrid lebnitz created calculus that gave a new high-functional mathematical approach to the analysis of physics. He drew the perfect cutoff for the first scientific revolution. Physics presents two unique features: the use of experimental evidence to examine laws of physics, and the use of mathematical language to express laws of physics. The progressive development of physics became an independent discipline。
Modern physics
In the early part of the twentieth century, physicists found that classical physics had serious flaws: the zero results of the mcernson-morey experiment did not match classical physics predictions, the bold radiation spectrum did not match the thermodynamic predictions, classical electromagnetics could not explain the photoelectric effects and the atomic spectrum, and the physical properties of radioactive materials seemed to run counter to classical physics decisions. These flaws have brought an unprecedented challenge to the academic community and have completely shaken the foundations of the old theoretical system, leading to the emergence of relativism and quantum mechanics in the two theoretical systems of physics of the twentieth century, thus ushering in an era of modern physics. Relativity and quantum mechanics provide reasonable answers to these difficulties. Moreover, physicists use relativism and quantum mechanics to learn from microsystems such as atoms, molecules and so forth, as well as condensed macrosystems, thereby revealing more deeply the working mechanisms of nature and promoting the flourishing of material civilization。
The fifth solway conference, held in 1927, brought together the world's most outstanding physicists, with their mental stress, to discuss the core theory of quantum theory
Although the scope of research in physics is extensive, physicists often use core theories of some physics. These theories have been tested repeatedly in many different experiments, and predictions of natural phenomena are considered to be sufficiently accurate. For example, classical mechanics theory can accurately describe the movement of objects, but two prerequisites must be met, namely, that objects are larger in size than atoms, and that objects are moving at a faster rate than light. :2 these core theories are still a popular area of research today. For example, in the second half of the twentieth century, three centuries after the presentation of classical mechanics in newton (1642-1727), scholars discovered and created the theory of confusion, which revealed that the decisive predictability of the system of mechanics was a misconception。
These core theories, which broadly cover the fields of basic physics, such as classical mechanics, quantum mechanics, thermodynamics, statistical mechanics, electromagnetics, narrow relativism, etc., are important tools for specialized topics of progressive research。
Application and impact
Physics is a basic science, not an applied science. Physics is also considered to be fundamental science in basic science, as other branches of natural science, such as chemistry, astronomy, geophysics and biology, are subject to the laws of physics. For example, the nature, structure, chemical reaction of the chemical research substance (chemical focus on atomic dimensions, which is the main chemical and physical boundary). The structure is formed by the interaction of particles and particles. The physical laws that govern the physical nature and chemical reactions, such as energy constants, power constants, charge constants, etc., have been explained by the theory that chemists can only use vague concepts in the past。
Magnetic resonance imaging across the human brain
Applied physics refers to physical research for practical use. Courses in applied physics are usually planned in a number of applied disciplines, such as geology or electrical engineering. Unlike engineering, applied physics does not specifically design a component or machine, but rather uses physics theory or physical research to develop a new technology or solve a problem。
Engineering is applied to many physical theories. For example, before learning the techniques of building bridges and other buildings, it is important to learn the theory of semantics. The world's best concert hall must be designed with sound science first. Optical components that are better designed and constructed must first be well-thought-out. Flying simulators, video games, films, etc., designed to take into account physical factors, are even more self-serving。
Nature, composition, structure, and patterns of change of chemically studied substances. The subjects of chemical research relate to the interrelationship between substances or between substances and energy. Traditional chemistry is often a process of exposure, change, chemical reaction, or transformation of a substance into another substance。
Computer simulations show how the space shuttle is warming back to the atmosphere
These changes sometimes require the use of electromagnetic waves, which are responsible for triggering chemical effects. Sometimes, however, chemistry does not have to be about the reactions between substances. The relationship between the substance and the light is studied in the spectroscopy and is not related to chemical reactions. To be precise, chemical research ranges from a nuclear-electronic system that includes molecules, electrons, ion, atoms, atoms. With the development of quantum physics, chemistry has incorporated the theory of quantum physics to create a better theoretical basis。
Some of the methods used in physics are traceable and contemporary. Physics has influenced, to a greater or lesser extent, a number of important academic areas, such as the application of theories and methods in a great deal of physics in economics, which often involve uncertainty or confusion。
